ReaderToc = InputContainer:new{ toc = nil, toc_menu_title = _("Table of contents"), } function ReaderToc:init() if not Device:hasNoKeyboard() then self.key_events = { ShowToc = { { "T" }, doc = _("show Table of Content menu") }, } end self.ui.menu:registerToMainMenu(self) end function ReaderToc:cleanUpTocTitle(title) return (title:gsub("\13", "")) end function ReaderToc:onSetDimensions(dimen) self.dimen = dimen end function ReaderToc:onUpdateToc() self.toc = nil return true end function ReaderToc:fillToc() self.toc = self.ui.document:getToc() end -- _getTocTitleByPage wrapper, so specific reader -- can tranform pageno according its need function ReaderToc:getTocTitleByPage(pn_or_xp) local page = pn_or_xp if type(pn_or_xp) == "string" then page = self.ui.document:getPageFromXPointer(pn_or_xp) end return self:_getTocTitleByPage(page) end function ReaderToc:_getTocTitleByPage(pageno) if not self.toc then -- build toc when needed. self:fillToc() end -- no table of content if #self.toc == 0 then return "" end local pre_entry = self.toc[1] for _k,_v in ipairs(self.toc) do if _v.page > pageno then break end pre_entry = _v end return self:cleanUpTocTitle(pre_entry.title) end function ReaderToc:getTocTitleOfCurrentPage() return self:getTocTitleByPage(self.pageno) end function ReaderToc:onShowToc() if not self.toc then self:fillToc() end -- build menu items if #self.toc > 0 and not self.toc[1].text then for _,v in ipairs(self.toc) do v.text = (" "):rep(v.depth-1)..self:cleanUpTocTitle(v.title) end end local menu_container = CenterContainer:new{ dimen = Screen:getSize(), } local toc_menu = Menu:new{ title = _("Table of Contents"), item_table = self.toc, ui = self.ui, width = Screen:getWidth()-50, height = Screen:getHeight()-50, show_parent = menu_container, } table.insert(menu_container, toc_menu) function toc_menu:onMenuChoice(item) self.ui:handleEvent(Event:new("PageUpdate", item.page)) end toc_menu.close_callback = function() UIManager:close(menu_container) end UIManager:show(menu_container) return true end function ReaderToc:addToMainMenu(tab_item_table) -- insert table to main reader menu table.insert(tab_item_table.navi, { text = self.toc_menu_title, callback = function() self:onShowToc() end, }) end